<?php
header('Content-Type: application/json; charset=utf-8');
require_once '../../bbs/db_conn.php';

// PDO 연결 생성
$pdo = db_conn();

try {
    $base_year = $_GET['base_year'] ?? '';

    if (empty($base_year)) {
        echo json_encode(['start_date' => '', 'end_date' => '']);
        exit;
    }

    $stmt = $pdo->prepare("
        SELECT start_date, end_date
        FROM edu_contents
        WHERE category_code = 'CA10003'
          AND base_year = ?
        GROUP BY start_date, end_date
        ORDER BY start_date DESC, end_date DESC
        LIMIT 1
    ");
    
    $stmt->execute([$base_year]);
    $result = $stmt->fetch(PDO::FETCH_ASSOC);

    if ($result) {
        echo json_encode([
            'start_date' => $result['start_date'],
            'end_date' => $result['end_date']
        ]);
    } else {
        echo json_encode(['start_date' => '', 'end_date' => '']);
    }

} catch (Exception $e) {
    echo json_encode(['error' => $e->getMessage()]);
}
?>